Nvidia has silently updated its mobile GPU lineup with four new GPUs that should eventually start to appear in select notebooks. The lineup brings back the well known Nvidia MX moniker and includes the GTX 675MX, GTX 670MX, GT 645M and GT 625M.

We'll start with the GT 645M and the GT 625M as these are simply updated versions of the GT 640M and the GT 620M GPUs. The GT 645M has the same 384 CUDA cores as the GT 640M but works at slightly higher 710MHz for the GPU. It will still be available with both DDR3 and GDDR5 memory paired up with a 128-bit memory interface. The GT 625M also feature the same 96 CUDA cores as the GT 620M and works at the same 625MHz for the GPU. The only difference that we can see on Nvidia's specification list is that although it uses the same DDR3 memory, the memory interface is listed at "up to 128-bit", adding to a higher 28.8GB/s memory bandwidth.

The GTX 675MX and GTX 670MX are a bit more interesting, as they are quite different than the GTX 675M and the GTX 670M. Both are based on the 28nm Kepler GPUs and features 960 CUDA cores. According to what we can gather from the specs, the GTX 675MX appears to be based on a crippled GK104 GPU while the GTX 670MX is based on the GK106 one. The GTX 675MX works at 600MHz for the GPU and comes with GDDR5 memory clocked at 1800MHz and paired up with a 256-bit memory interface adding up to 115.2GB/s of memory bandwidth. The GTX 670MX works at the same 600MHz for the GPU but comes with GDDR5 memory clocked at 1800MHz and paired up with a 192-bit memory interface adding up to 67.2GB/s of memory bandwidth.

Nvidia's mobile lineup is slowly getting a bit crowded and with all the variations one should closely check the specs of the GPU inside the new notebook. The new lineup is expected to show up in new notebooks pretty soon.

MSI announced that it is now shipping the latest version of its 17-inch GT70 gaming notebook, which will pack Nvidia's Geforce GTX 675M graphics card.

In addition to the GT70, MSI squeezed in two other notebooks that will be known as GE70 and GE60 lineups. Both are based on the HM76 chipset, rather than the HM77 seen on the GT70, and paired up with Geforce GTX 660M graphics card.

The GE60 will feature a smaller 15.6-inch 1920x1080p screen. Also, the entire lineup will have Intel Core i7-3610QM CPU and Windows 7 Home Premium 64-bit OS.

The HM77 and Core i7-3610QM 17.3-inch 1920x1080p GT70 model will be paried up with Nvidia Geforce GTX 675M GPU with 4GB or 2GB of memory depending on the SKU. It will feature up to 16GB of memory, Killer E2200 network card, SteelSeries programmable backlit keyboard and a 9-cell battery, a must when you are powering a 17-inch screen. The HDD option include two 64 SSDs in RAID paried up with a 750GB HDD or 1.5TB of HDD space (2x750GB) depending on the SKU.

In case you missed our earlier posts, the Geforce GTX 675M is based on 40nm Kepler GPU with up to 384 processing cores, 620MHz GPU clock. The 2GB or 4GB of memory should be clocked at 1500MHz and paired up with a 256-bit memory interface.

This makes the GE60 model a bit more interesting as the Geforce GTX 660M is actually based on 28nm Kepler GPU with up to 384 processing cores and a 835MHz GPU clock. It has up to 2GB of GDDR5 memory running at 2000MHz and paired up with a 128-bit memory interface.

The price starts at US $2199.99 for the top GT70 SKU and go as low as US $1299.99 for the one GE60 SKU. Unfortunately, the actual release date haven't been announced but we are sure that these will show up pretty soon.

According to VR-Zone, AMD will officially launch its next generaton flagship mobile GPU on 24th of April, the HD 7970M.

Despite the HD 7970M name, the codenamed Thames mobile GPU (as it was mostly the case with mobile GPUs) shares no similarities with its desktop counterpart as it is based on 28nm Pitcairn GPU that powers AMD Radeon HD 7800 desktop GPUs. The HD 7970M still packs quite a punch and it will quite interesting to see how well it will fare against Nvidia's 40nm Fermi GTX 675M/670M flagship GPUs as well as GTX 660M, the most powerful 28nm Kepler based GPU from Nvidia.

We already wrote a lot about Nvidia's mobile GPU lineup, and back then, Nvidia claimed quite a few design wins, but we are sure that AMD will pretty much do the same on April 24th. There was some recent leaks regarding Alienware's upcoming M18X gaming notebook that will be available with both HD 7970M and GTX 675M/660M options.

In addition to the HD 7970M, AMD will probably follow up with HD 7800M series, codename Lombok that will be similar to Cape Verde GPUs, while the low end will be covered by AMD's upcoming Trinity APUs.